Chain tire-grip.



W. E. LASHAH.

CHAIN TIRE GRIP.

nPPLxcMmN FILED JAN. 7, 1911.

Patented Dec, 7, 1915.

WALTER B. LASHAR, OF BRIDGPORT, CONNECTICUT, ASSIGNOR TO AMERICAN CHAIN COMPANY, INCORPORATED, OF BRIDGEPORT, CONNECTICUT, A CORPORATION 0F NEW YORK.

CHAIN TIRE-GRIP.

Application filed .T anuary 7, 1911.

To all whom/t may concern Be it known that I, VALTER B. LAsiiAR, a citizen of the United States, and resident of Bridgeport, county of Fairfield, and Statek of Connecticut, have made certain new and Useful Inventions Relating to Chain Tire'- Grips, of which the following is a specifica;

tion, taken in connection with the acconti? t panying drawing, which forms part of thel same.

This invention relates especially to chain y sisting largely of hardenech'butted, Curbed links, the lateral links being unwelded and the central wearing links being, it desired, electrically welded.

In the accompanying drawing, showing in a somewhat diagrammatic manner, illustratire embodiments of this invention, I`ignre l is an elevation showing a torni ot grip applied to a wheel. Fig. 2 is an enlarged perspective view showing a. tread member and the connected parts ot' the Side `members. Fig, S is an enlarged view ot one form of link. and Fig. 4 is a corresponding view ot' another `form oi link.

.'\s indicated in the drawings, the chain grip may comprise flexible side members 2, which may be conveniently' formed of chain ol: any description or ot' other flexible material, il desired, and which are preferably provided with detachal'ile `Fasteninfzj hooks or ineans'Q() to allow the grip to be readily applied to and removed from the tire of the wheel Il. 'lhe tread chains 3 are spaced around the tire at the desired intervals and may be attached to the side members in any desired way so that pre Ferably, they are sollieiently loose as indicated in Fig. l, to allow the grip to 'freely travel around the tire nnder service conditions. llach tread member is preleralily largely composed oi hardened steel, cnrbed chain links, which may be attached to the side members by similar links, il" desi red, or be attached thereto by special attaching links or means 4, 5. 1With such special attaching means as indicated in Fig. 2, the tread chains may be separately made and sold and if the attaching links are lett Specification of Letters Patent.

Patented Dec. 7, 1915.

Serial No. 601,285.

comparatively soft such separate tread chains may be conveniently attached to the side members, as for instance, when it is deslred to replace broken or worn'treads.

The Curbed chain links which form the larger part of each tread member are preferablyornied of' suitable high carbon` Steel oi'other special hardening steel. or material such for instance as chrome steel and suithardencd or tempered to secure the desired high degree of rigidity of the links, it being ofv course understood that similarly hard rigid links may be secured by case hardening the lower or softer steels. The Curbed links may, if desired, be formed vas indicated in Fig. 3 in which the batted ends 17, 18, of the material of which the link 16 is composed are preferably located intermediate and substantially midway between the ends of the link. In this way when the links are hardened they are given sufficient rigidity so that the ends 17, 18, are held in substantial alinement and separation and other distortion prevented under service conditions. This may be promoted by forming the ends ofv the link material with suitable interlocking or interengaging projections and depressions which may, if desired; be given a substantially eonicallyinterlocking form as indicated in Fig. 4l. The end 7 of the link material is in the form of a conical projection and the corresponding conical recess 8 in the other-.end of the link material cooperates therewith so as to edectively hold the parts in alinement when hardened. Also, it desired, the cross section of material at the interlocking or plain bntted link erids may be increased as indicated and this'jo'int may with'good results, be formed intermediate or midway between the ends et' the links 6. Vhcnthese links have been formed and cnrbed they may bev'hardcned in any desired way and then, it' desired, the, central links of each tread member which are ofcourse exposed to the greatest wear, may with good results. be. welded in ahy desired way, as by an electric welding machine which may simultaneously weld thedesired member of the central wearing l-inks of each tread chain; the operation being etfectedouickly enough to prevent softening the entire link or, it desired, the links may be hardened after this welding has been eilccted.

As indicated in Fig. 2, the three lateral links 16 on each side of the tread chain lico CIK

adjacent the special fastening" hooks 4, 5 may be formed oi' such hardened, unwelded, butted, eurbed links and as illustrated, the three central nearing links (i may have their batted ends welded and if desired, given a sli glitly increased cross section at the points of weld 8, as indicated in Figs. 2 and Il. It is of course understood that any desired number of be wearing links et the tread Chains may lie welded and that the lateral unn'elded links may be provided with interlocking ends, it desired, in order to insure greater rigiility and wearing qualities.

llaving described this invention in eonneetion with a` number of illustrative einbodiinents, proportions, sizes, shapes, and materials olf parts, to the details of which disclosure the invention isnot of Course to be limited, what is claimed as new and what is desired to be secured by Letters vPatent is set- .torth in the appended claims.

l. The tire grip comprising.; tread members and eonneeted chain side members formed with detaelnble fastening nieans to readily apply and remore the grip from a vehicle tire and allow the grip to more freely around the tire under service conditions, said tread members comprising at taeliing links at either end ot' the same attaching; them to the side members and beiner otherwise formed oi hardened steel Curbed links, the ends of the link material. coming together adjacent the middle ot' each link, the central wearing;` links of said tread inem bers beingr electrically butt Welded and the lateral links having substantiall),Y eonicall)Y interlocking nends to assist in preventing distortion of the links.

2. ille tire grip eoinprisunel tread inembers and connected flexible side members formed with. detachable fastening' means to readily apply and remove the Arip from a vehicle tire and'allow the grip to more around the tire under service conditions, said tread members comprising attaching meansat either end ot the same attaching them to the side members and beine,` othen Wise formed ot hardened, curbed links formed of material having' meeting ends intermediate the ends ot the links, the 'central wearing links of said tread members being welded and the lateral links having interlocking ends to assist in preventing distortion.

3. The. tire grip comprising tread mena hers and connected flexible side members formed with fasteniingT means to apply and remove the grip from a vehicle tire, said tread members being largely formed of hardened steel., Curbed links, the central Wearlng links of said tread members being welded and the lateral links being` unwelded, hardened steel, batted, Curbed links.

4. The tire grip comprising4 tread inembers and connected flexible side members formed with Jfastening means to apply and remove the grip from a vehicle tire, said tread members comprising' Curbed links haring electrically welded, butted ends and comprising` lateral unu'elded, Curbed links having` batted ends.

rllhe Chain tread member for a tire grip comprising' attaching links at either end of the saine 'lor attaching it to the side inem bers of a grip and being` otherwise formed ot hardened steel, Curbed links, the ends of the link material coming together intermediate tbe ends et each link, the central wearing links of said tread member being electricall)v butt-Welded.and the lateral links hain ingr substantialljy7 conieally interlocking ends to assist in preventingdistortion of the links.

6. The chain tread member for tire grips largely' formed oli hardened steel, Curbed links, the eentrallinks of said tread member being;` electricallj,T welded and the lateral Curbed links being hardened and provided With interlocking ends to assist in preventing distortion of the links.

i l'TALTER l). LA SHAR.

Witnesses:

HARRY L. DUNCAN, Jnssrn B. KAY, 

